简介
本文档是Catalyst 9800列出各种历史事件的快速参考指南。通过利用9800平台的永远在线日志记录功能，您可以快速轻松地列出特定类型的事件，前提是您知道特定日志行的外观。
结构
本文围绕“show logging profile wireless”命令的使用展开，该命令主要通过所有与无线相关的二进制日志（即使不启用任何形式的活动调试，也始终在线）。
“start last <time period>”允许返回到日志中的某个时间段。
如果不使用管道限制搜索，命令将在终端上输出大量数据，这就是以下所有示例使用管道来处理特定事件的原因。
客户端
列出已成功验证的客户端：
myc9800-CL#show logging profile wireless start last 10 days | i Authentication Success
2020/09/26 16:41:21.397677 {wncd_x_R0-0}{1}: [ewlc-infra-evq] [19680]: (note): Authentication Success. Resolved Policy bitmap:11 for client 02c0.2901.34c8
2020/09/26 17:04:33.523999 {wncd_x_R0-0}{1}: [ewlc-infra-evq] [19680]: (note): Authentication Success. Resolved Policy bitmap:11 for client d280.eb73.6044
2020/09/26 17:21:59.892585 {wncd_x_R0-0}{1}: [ewlc-infra-evq] [19680]: (note): Authentication Success. Resolved Policy bitmap:11 for client 02c0.2901.34c8
2020/09/26 17:32:09.289109 {wncd_x_R0-0}{1}: [ewlc-infra-evq] [19680]: (note): Authentication Success. Resolved Policy bitmap:11 for client 02c0.2901.34c8
2020/09/26 17:41:58.123180 {wncd_x_R0-0}{1}: [ewlc-infra-evq] [19680]: (note): Authentication Success. Resolved Policy bitmap:11 for client 64b5.c66d.13ac
列出获得成功IP地址的客户端：
myc9800-CL#show logging profile wireless start last 10 days | i IP learn successful
2020/09/26 16:41:30.621520 {wncd_x_R0-0}{1}: [client-iplearn] [19680]: (note): MAC: 02c0.2901.34c8 Client IP learn successful. Method: DHCP IP: 192.168.1.13
2020/09/26 17:04:37.622905 {wncd_x_R0-0}{1}: [client-iplearn] [19680]: (note): MAC: d280.eb73.6044 Client IP learn successful. Method: IP Snooping IP: 192.168.1.36
2020/09/26 17:22:03.830465 {wncd_x_R0-0}{1}: [client-iplearn] [19680]: (note): MAC: 02c0.2901.34c8 Client IP learn successful. Method: IP Snooping IP: 192.168.1.13
2020/09/26 17:32:09.966598 {wncd_x_R0-0}{1}: [client-iplearn] [19680]: (note): MAC: 02c0.2901.34c8 Client IP learn successful. Method: IP Snooping IP: 192.168.1.13
2020/09/26 17:33:30.236544 {wncd_x_R0-0}{1}: [client-iplearn] [19680]: (note): MAC: 3cf7.a4ae.f607 Client IP learn successful. Method: IP Snooping IP: 192.168.1.49
RRM
信道更改
9800# show logging profile wireless | include history-channel
2020/02/13 10:50:03.297 {wncd_x_R0-0}{2}: [radio-history-channel] [24955]: (note): Channel change for AP5c83.8f6e.4250 Slot:1 Band:802.11a Previous Chan:100 Current Chan:132 chan width: 40 Reason: DCA Algorithm
噪声和干扰值
以下内容需要设置“set platform software trace wireless chassis active r0 rrm rrm-client-dca info”以在日志中显示该信息：
9800#show logging profile wireless start last x hours| include rrm-client-dca
2020/06/26 15:44:08.636988 {wncd_x_R0-0}{1}: [rrm-client-dca] [9853]: (info): f4bd.9e38.4200 (Radio: 802.11a) Channel set request: on cell to channel 40 from 40 (width 20) to reduce co-channel interference (noise/interference/rssi) from (-128,-128,127) to (-128,-128,127) Reason: 0x1 for slot id: 1
2020/06/26 15:44:08.640828 {wncd_x_R0-0}{1}: [rrm-client-dca] [9853]: (info): f4bd.9e38.4200 (Radio: 802.11bg) Channel set request: on cell to channel 6 from 1 (width 20) to reduce co-channel interference (noise/interference/rssi) from (-77,-35,-35) to (-66,-58,-57) Reason: 0x4 for slot id: 0
2020/06/26 15:54:18.671638 {wncd_x_R0-0}{1}: [rrm-client-dca] [9853]: (info): f4bd.9e38.4200 (Radio: 802.11a) Channel set request: on cell to channel 40 from 40 (width 20) to reduce co-channel interference (noise/interference/rssi) from (-128,-128,127) to (-128,-128,127) Reason: 0x1 for slot id: 1
2020/06/26 15:54:18.673055 {wncd_x_R0-0}{1}: [rrm-client-dca] [9853]: (info): f4bd.9e38.4200 (Radio: 802.11bg) Channel set request: on cell to channel 6 from 6 (width 20) to reduce co-channel interference (noise/interference/rssi) from (-128,-128,-58) to (-128,-128,-58) Reason: 0x1 for slot id: 0
DCA算法运行
9800-17#show logging profile wireless start last boot | i Running DCA Algo
2020/02/14 16:23:09.177 {rrm_bg_R0-0}{1}: [rrm-mgr-dca] [22117]: (note): (Radio: 802.11a) Running DCA Algorithm
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